/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.facebook.presto.tpch.statistics;

import java.util.Optional;

public class MinMaxSet<E>
{
    private Optional<E> min = Optional.empty();
    private Optional<E> max = Optional.empty();

    public MinMaxSet()
    {
    }

    public Optional<E> getMin()
    {
        return min;
    }

    public Optional<E> getMax()
    {
        return max;
    }

    public void add(E element)
    {
        final Comparable<? super E> castedElement = (Comparable<? super E>) element;
        if (!min.isPresent() || castedElement.compareTo(min.get()) <= 0) {
            min = Optional.of(element);
        }
        if (!max.isPresent() || castedElement.compareTo(max.get()) >= 0) {
            max = Optional.of(element);
        }
    }
}
